Sewing-machine.



J. R. MOFFATT & R. S. KELSO.

SEWING MACHINE.

` APPLICATION FILED N-OV- 4. I9Il. 1915?91Ln 3 SHEETS-SHEET l.

IIIIIII IIIII I '"l III :Il

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Patented Oct. 26, 1915.

J. R. IVIOFFATT & R. S. KELSO.

SEWING MACHINE.

Ll'gl. l. Patented 00f.26,1915.

3 SHEETS' SHEET 2.

WITNESSES I. II. II/IoFIAII III II. s. KELso.

SEWING MACHINE.

APPLICATION FILED N0v.4. I9II.

Patented Oct. 26, 1915.

II I9 E I Z' Q a (IQ WI I WSI? Il', Allowing/y istrip;

JAMES R. MOFFATT AND RALIH S. KELSO, OF CHICAGO, ILLINOIS, ASSIGNORS TO UNION SPECIAL MACHINE COMEANY, 0F CHICAGO, ILLINOIS, A CORIGRATION OF ILLINOIS.

SEXVING-MACI-IINE.

Specification of Letters Patent.

Patented @ch 26, i915.

Application Yled November 4, 1911. Serial No. 658,564.

To all wlw/m t may concern.'

Be it known that we, JAMES R. Morrar'r and RALPH S. InLso, citizens of the United y new and useful Improvements `in Sewing-` Machines, of which the following is 'a description, reference being had to the accompanying drawing and to the letters and iigures of reference markedthereon. y

The invention relates to new'and useful improvements in sewing machines, and more especially to multiple needle chain stitch sewing machines.

An object of the invention is to provide a needle guard which may be moved into engagement with the needle in the rear thereof, so as to prevent the needle from being deflected and struck by the looper, which needle guard is so operated as to partake of all the movements of the'looper.

A further object of the invention is to provide a needle guard of the above char acter, which is so constructed as to engage the needle in the rear side thereof to prevent the deflecting of the needle when it is operating to draw up the previous needle loops shed from the looper.

A further object of the invention is to provide a multiple needle machine, wherein the needles are arranged diagonally to the line of feed, so that a plurality of loopers moving transversely of the line of feed may cooperate with the needles, -with needle guards which partake of all the movements of the looper and engage the needle at the rear side thereof, both on the forward and the backward movements of the loopers, and prevent any deiection of the needles, so that the same will be struck by the loopers and prevent any deflection of the needles during the drawing up of the needle loops, as they are shed from the loopers.

These and other objects will in part be obvio-us, and will in part be hereinafter more fully described.

In the drawings which show by way of illustration one embodiment of the inventiem-Figure l is a front view of a sewing' machine embodying my improvements, the

work support being removed; Fig. 2 is` a top plan view of the parts directly beneath the work support, the feed dog being removed for the sake of clearness; Fig'. 3 is a vertical sectional View on the line SW3, of

F ig. 2; Fig. 4 is an enlarged detail in side view, showing the position of the'loopers and needle guards at` the time when vthe loopers are entering the needle loops; Fig. 5 is a plan view of the same; Fig. 6 is an enlarged detail view, showing the position o f the needle guards and the looper at the time when the needle loop is being shed from the looper and the needle is operating to draw up the same close to the other side of the work; Fig. 7 is a plan view of the same, and in this view 'the position of the needle and looper thread in connection with one looper' is shown; Fig. 8 is a diagrammatic view, showing the p/osition of the needle guards, the loopers and needles on the down stroke of the needles; and Fig. 9 is a similar view, showing the position of the parts on the up stroke of the needles.

In the drawings, the invention is shown as applied to a sewing machine consisting ofa bed plate 1, from which rises a standard 2 having an overhanging arm 3.

Reciprocating in the overhanging arm 3 is a needle bar 4, carrying a plurality of needles 5. These needles, as herein shown, are arranged in a line diagonally of the line of feed (see Fig. 2). The needle bar 4.- is reciprocated from the usual needle lever 6, which in turn is vibra-ted by a link 7 connected to an eccentric on the main shaft 8. Coperating with each needle is a looper. lIhe looper 9 cooperates with the left hand outside needle. The looper 10 coperates with the middle needle, and the looper 1l cooperates with the right hand outside needle. These loopers are mounted on a single carrier 12, which is pivoted to a looperrocker 13, mounted in suitable bearings in brackets carried by the bed plate l. The looper rocker 12 is oscillated through an Varm l-l, which engages an eccentric on the main shaft S. The looper carrier is vibrated on its pivotal support by ailink 15, which is pivoted to the lower end'of the needle lever extension 16.V `These parts are of the usual construction in a chain stitch machine, and

will not need further description.

The feed dog 25 is carried bythe usual feed bar 26, which is raised and lowered by a cam 27, and is moved back and forth from a connection at the forward end of the main shaft of the machine. rlhis feeding mecha nism; also the controlling devices foi1 the looper threads, and the controlling devices thisneedle loop up close to v'the work, which for v`the needle threads, are of the usual type and will not need further description. y The looper-operating mechanism, as vis usual in :this type' of machine, causes -the looper to move forward into the needle loop, and thence laterally, in order to'avoid'the needle, so that the needle may on its down strokefenter fthe thread trianglemformed by the needle loop of the p ijevious stitch around the looper, the looper body and the looperf'thread ruiming from the `eye of 'the looper to the previous stitch.

It is customary inthis type Vof'machine to so vco'ntrolthe tension on the needle .thread "that when vthe needle-loop of the previous Stitch isA dropped fromthe locper vby the backward movement ofthe looper, to pull gets it out of the way of theiieXt forward mov'ement of the looper, and also aids materiallyin the nal setting of the stitch. This Vdrawing up of lthe needle loop is accomplished bythe down stroke of-'lthe needle, and,',therefore, there is more or lesslatei'al strain on theneedlefduring the drawing up of this previous needle loop.

The ypresent machine contemplates v`the placing ofthe needles in a line, which, While diagonal to the lineof feed, is as nearas possible toa linev at right angles toi the'line of feed. This necessitates theA usingof compara'tively .thin loo-persand smallfneedles Furthermore, any material deflection-in the needle Awhich co-perates with: one: looper,

may' cause the same-.to be interfered withby thenevt.Y adjacent looper. n

YThe vpresent invention contemplates vthe providing of vneedle guards which co operate with each `of the needles and; prevent-'any side :movements of the'fneedles at this'vtime,

rwhen theneedles are under strain vvin drawingl up the shed needle loops.

.The invention also contemplates a fneedle guard| for each-needle,whichV .will prevent the needle fromV being deflected so as to be struck byl the llooper, and, therefore,v the loopersmay be set `so astomove very elosevto v the needles, where. a needlecguard ofY this kind vis used. n

As herein shown, the needle-guards. are mountediipon the loopercarri'er andapartake ofall4 the Vmovementsof lthe loopers. That;l is, the .rneedle guardsare moved"-back and forth, and are also moved laterallywhen theg'looper isgiven fitsneedle-avoiding movement. The needle guards consist of t aplu ralityoffupwardly projecting parts forming y spaced Walls-,between Whichthe needlesunay j enter.

Referring more .ini detail `toitheneedle guards, the same censistof a carrier or support having'- aVl projecting member 17 atythe -re'ar-v side thereof: and f aY proj ectingv member at'ithe Afront side thereof. #Between these e projectingmembers 17 and 18 are two :pro-

jecting members 19 and 20. rlhe projecting 'member 19, as herein shown, is formed in two parts 21and 22, while the projecting `ineinbei. 20is likewiseiformed in two parts 23 and 21. The projecting member 21 is in V--"adva-nee of the projecting member 22. The Y'part 21 of the projecting member 19 and the Aprojecting member 17 serve as a-needlelguard for the left-handneedle, as viewed in Figs. 4 and 6 ofthe drawings. The projecting member 17 guards the needle when the loop is Abeing Eshed efrom `the looper and .prevents -itsd'eflection upon the drawing up ofthe `threads,.as shown .in' Fig.. 7. VThe part 21 'guards theneedlefwhen the looper is moril ing. fo-rwardninto theneedle loop and prevents its qdeieotion into the ,path of the needle. Vv."'lhepart22y of the projection. 19

. the'deliection ofthe-needlesduring thefeed. Theseeiieedle guardsalso, prevent 4the deflection of theneedles-into vtliepath ofthe vloopersgat Ytheftime wlienf'the. loopers are vmoving forwardinto `the needle loops.

The.members.21 and 22 and v`also 28and 24, as herein Shown, are formed integral, for

fthe reasontllatthefneedles are brought` com- .Aparativelyclose ftogether, 'as viewed in Aa direction transverse to -the line of feed. From certain r aspects ofy `the invention, how- -ever,' vit willbeseen that-these .partsm ay be made separateand also from certain aspects of 4the invention on ly one i pair of .projecting members may be -used .withv a sin gle .needle It willfbeseen,l.,therefore,that with each vneedle-there is a :pair of. piojecting meni- .bers which, are spaced and which .form-a rv`needle,guard. for -theineedle These proj cctf.ingr.me1nbers Apartakefof-all the movements 1 offthelooper which cooperates with the vneedle ls,fand lirstpne wall ofi the projecting `mean-bersand then'theother wallmust serve Y asa needleguardto prop'erlyfhold lthe needle in its normal path. Theispacebetween .the

projecting n'members :servesy as e a. clearance space for) the. needle. These projecting niembers for each needle, therefoi'e,f`or1n.u needle 's guard and said projecting members constitute means foroengaging the needle 1 onthe .rearfside thereofoniboth forward and -return-strokesof .the'loopen By the-reak sidevof the yneedle 'throughout :the f description. and claims, I -h ave reference vto the -vreari-facenof the needle, as viewed-'by Lthe operator.

1t. is .obvious that'niinoirclianges Ain--tlie details of construction may be made, without departing from the spirity of the invention, as set forth in the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is y l. A sewing machine including in combination a needle, a looper, a needle guard moving with the looper and having two spaced walls adapted to engage the needle, and means for moving said needle guard whereby one wall engages the rear face of the needle on its downward movement, and the other wall engages the rear face of the needle on its upward movement.

A sewing machine including Vin combination, a needle, a looper movable into and out of the needle loop, and laterally to avoid the needle, a needle guard moving with the looper, and means for operating it to engage the needle on the rear face of the latter in both its movements.

3. A. sewing machine including in combination, a needle, a needle guard therefor, and means for operating it to cause the needle in a downward movement to be guided on its rear face by one face of the guard and in its upward movement to be guided on said rear face by another face of the guard.

l. A sewing machine including in combination, a feeding mechanism, a needle, means for reciprocating the needle, a looper moving substantially at right angles to the line of feed, a needle guard, and means for causing said needle guard to engage the rear side of the needle on both the upward and downward strokes of the needle, said needle guard having a movement transverse to the line of feed.

5. A sewing machine including in combination, a feeding mechanism, a needle, means for reciprocating the needle', a looper moving substantially at right angles to the line of feed into an d out ofthe needle loop, and moving laterally to avoid the needle, a needle guard, and means for causing said needle guard to engage the rear side of the needle on both the upward and the downward strokes of the needle, said needle guard being connected to and movable with the looper.

6. A sewing machine including in combination, a feeding mechanism, a needle,4 a

looper movable transversely to the line. of

feed, means for moving the looper'into and out of the needle loop and for giving the looper aneedle-avoiding movement, a needle guard movable transversely of the line of feed and `having means for engaging the needle on both the upward and downward strokes of the needle.

7. A sewing machine including in combination, a feeding mechanism, a needle, a looper movable transversely to the line of feed, means for moving the looper into and out of the needle loop and for giving the looper a needle-avoiding movement, a needle guard movable transversely of the line of feed "and having means for engaging the needle on both the upward and downward strokes of the needle, and means for moving the needle guard with the looper.

S. sewing machine including in combination, a feeding mechanism, needle, a looper movable transversely to the line of feed, means for moving the looper into and out of the needle loop and for giving the looper a needle-avoiding movement, a needle guard movable transversely of the line of feed and having means for engaging the needle on both the upward and downward strokes of the needle, and means whereby the needle guard is connected to the looper, so as to partake of all the movements of the looper.V

v9. A sewing machine including in combination, a needle, means for reciprocating the needle, a looper coperating with the needle, a needle guard having laterally spaced projecting members, one of which engages the needle on its rear Vface on its downward movement and the other of which engages the needle on said rear face on its upward movement.

l0. A sewing machine including in combination, a needle, means for reciprocating the needle, a looper coperating with the needle, a needle guard having spaced projecting members, one of which engages the needle on its rear face on its downward movement, and the other of which engages the needle on said rear face on its upward movement, and means for moving the needle guard in timed relation with the looper.

11. A sewing machine including in combination, a needle, means for reciprocating the needle, a looper coperating with the needle, a needle guard having spaced projecting members, one of which engages the needle on its rear face on its downward movement, and the ctherof which engages the needle on said rear face on its upward movement, and means for connecting the needle guard to the looper, whereby said needle guard partakes of all the movements of the looper.

12. A sewing machine including in combination, a plurality of spaced needles, a looper coperating with each needle, a needle guard for each needle comprising spaced projecting members, one of which engages the needle on its rear face on its downward stroke, and the other of which engages Vthe needle on said rear face on its upward stroke.

13. sewing machine including in combination, a plurality of spaced needles, a. looper coperating with each needle, a needle guardY for each needle comprising spaced projecting members, one of which engagesy the needle on its rear face on its downward stroke, and the other of which' engages the needleV on: said rear Aface on' its Aupward stroke, said needle guards being connected-1tje and partalring of alliY the movements of the loopers'. v,

14. A sewing ma'ehine including` in combination, a feeding mechanism, a plurality of needles arranged in-a line `diagonal to the line Vof feed,V a looper' for eaehneedle, a looperl Carrier on:--'Whieh 'said loopers are mounted, means for moving. sa-'df carrier' so Vthat said loopers are causedto move inra lpath transverse to 'the' line ofv feedland laterally thereof to avoidr the needle, av plurality of needlel guards, oneL for each needle, ineludi'ng spaced walls,` one of which engages the needle onrits downward movement, and

'the otherfof which engages the needle on its upwardi movement, saidfneedle guards being mounted uponl said Vleoper earrier, whereby the needle guards partake of all* the movements of thevr loeper.v

E 15.1A sewing'maehineincluding a needle, means for operating sai'd needle, a needle guard,'a" support for said needle gua-rd,

means for moving said guard so as to engage the rear face 0f the needle on its downward movement, and means for swinging said guard across the path of its forward movement to engage the rear side of the needle on its upward movement.

' 156. A sewingmaehine including. a needle, means for operating said needle, a needle guardV having spaced vertical needle guiding walls,v a support for said needle guard, means for moving the needle guard so as to position oneof'the guiding walls for engagement with the rear face of the needle on its downward stroke and' for swinging said needle guard across the path of its forward movement to cause the other needle guiding wall to engage the real' face of the needle onits upward movement.

In testimony whereof we alliX our signatures, inl presence of two witnesses.

JAMES R. MOFFATT. RALPHS. KELSO. Witnesses:

C. L. SrUR'rnvANT, C.. MCNEIL.

'Copies offthis patent maybe obtained for-ve cents eaehfby addressing the Commissioner of Patents,

' Washington, DLC. 

